netdev - Re: [PATCH net-next] r8169: Add 64bit statistics

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Date:	Wed, 16 Nov 2011 23:03:50 -0800 (PST)
From:	Stephen Hemminger <stephen.hemminger@...tta.com>
To:	Junchang Wang <junchangwang@...il.com>
Cc:	netdev@...r.kernel.org, romieu@...zoreil.com,
	nic swsd <nic_swsd@...ltek.com>,
	eric dumazet <eric.dumazet@...il.com>
Subject: Re: [PATCH net-next] r8169: Add 64bit statistics


> Switch to use ndo_get_stats64 to get 64bit statistics.
> Per cpu data is used to avoid lock operations.
> 
> 
> Signed-off-by: Junchang Wang <junchangwang@...il.com>

This was recently brought up in the proposed forcedeth patch.
You dont need per-cpu since Tx is locked by dev->xmit_lock and
rx is implicitly single threaded by NAPI. You do need to have
two u64_stat_sync entries (one for Tx and one for Rx).  
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